Trailrunner7 writes: A group of cryptographers in the UK has published a letter that calls on authorities in that country and the United States to conduct an investigation to determine which security products, protocols and standards have been deliberately weakened by the countries’ intelligence services. The letter, signed by a number of researchers from the University of Bristol and other universities, said that the NSA and British GCHQ “have been acting against the interests of the public that they are meant to serve.”

The appeal comes a couple of weeks after leaked documents from the NSA and its UK counterpart, Government Communications Headquarters, showed that the two agencies have been collaborating on projects that give them the ability to subvert encryption protocols and also have been working with unnamed security vendors to insert backdoors into hardware and software products. Security experts have been debating in recent weeks which products, standards and protocols may have been deliberately weakened, but so far no information has been forthcoming.

“We call on the relevant parties to reveal what systems have been weakened so that they can be repaired, and to create a proper system of oversight with well-defined public rules that clearly forbid weakening the security of civilian systems and infrastructures," the letter says.